The latest Command Center software by Alienware finally brings CPU, GPU, and memory overclocking capabilities to the "current-gen platforms with compatible components," so those using older Alienware hardware might not be able to fully enjoy these benefits. However, even XPS users can install this piece of code and use some of its features.
https://www.notebookcheck.net/Alienware-s-new-Command-Center-comes-with-CPU-GPU-and-memory-overclocking-options.366246.0.html
A built in fan control with quiet/game/normal modes would be a good feature.